Skip to content

Security and governanceBrief

How to secure LLM API keys in production

A key is not just a secret; it is spend and data-path authority. Scope it, store it correctly, monitor it, cap it, rotate it, and rehearse revocation.

By INFRO Editorial

Published

Updated

1 min read

A luminous cryptographic key protected inside layered AI infrastructure security controls

In short

Secure LLM API keys by keeping them server-side, storing them in a managed secret system, scoping each key to one owner and environment, restricting models, setting spend limits, monitoring usage, rotating regularly, and making revocation immediate.

On this page
  1. Treat keys as financial authority
  2. Reduce the blast radius
  3. Store, inject, and rotate
  4. Detect and respond

Treat keys as financial authority

A stolen model key can expose data and create spend. Never ship a privileged provider or gateway key in browser, mobile, desktop, or public repository code. Client applications should call your authenticated backend or use a narrowly scoped short-lived mechanism designed for that environment.

Give every key a documented owner, workload, environment, and expiry or review date.

Reduce the blast radius

Use separate keys for production, staging, development, services, and important customers where appropriate. Apply model allowlists, rate controls, and hard spend ceilings so compromise cannot access every capability or consume the whole account.

Do not share one key across a company. Shared credentials make rotation risky and investigation ambiguous.

Store, inject, and rotate

Keep secrets in a managed secret store, inject them at runtime, prevent them from entering logs, and scan repositories and build artifacts. Rotation should support overlapping old and new keys so production can move without downtime.

Revoke unused keys and keys whose owner or service no longer exists. Inventory drift is a security bug.

Detect and respond

Alert on unusual model access, geography where available, sudden request or spend changes, repeated authentication failures, and activity outside the workload's normal hours. Link the key to request traces for fast investigation.

Document the response: revoke, rotate, contain the service, inspect logs, notify stakeholders, and review whether the ceiling worked.

From the team that builds it

Where this shows up in INFRO

INFRO is a control plane in front of the provider accounts you already hold. The capabilities below are the parts of it this article touches, each with the documentation that defines its behaviour.

INFRO accounts are self-serve. Provider usage is billed to you by your providers; INFRO charges a software subscription and takes 0% of model spend. See plans.

About this article

Last checked against its sources on . The next review is due by . No separate named reviewer is recorded for this article.

How articles are written, sourced and corrected is set out in the editorial standards.

Revision history

  1. Removed the promotional template sections and the generic FAQ, moved product context into the product section, and corrected product wording to the current BYOK model.

Read next